Learning Goal: To analyze an oblique impact using the conservation of momentum and coefficient of restitution When an ob

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Learning Goal To Analyze An Oblique Impact Using The Conservation Of Momentum And Coefficient Of Restitution When An Ob 1 (42.64 KiB) Viewed 49 times

Learning Goal: To analyze an oblique impact using the conservation of momentum and coefficient of restitution When an oblique impact occurs between two smooth particles, the particles move away from each other with velocity vectors that have unknown directions and unknown magnitudes. If the y axis is within the plane of contact and the x axis is the line of impact, the impulsive forces of deformation and restitution act only along the line of impact (the x axis). Momentum of the system is conserved along the line of impact (the x axis) Σm(v.) = Σm(v.) The coefficient of restitution, e, relates the relative- velocity components of the particles along the line of impact (the x axis): (V)-(VA) (۷۸۰) (۷۰) The moments of both particles A and B are conserved in the plane of contact (the yaxis) because no impulse acts on either particle in this plane. Therefore, the y Figure 1 of 2 4m 6m Y Review Part A As shown, tennis ball A rolls off the top of a 10.0 m high wall, falls 4.00 m, and strikes another tennis ball, B obliquely (Figure 1) Before the collision, tennis ball Bhas a speed of 25.0 m/s as it moves upward. Each ball's mass is 57.0 g and the collision's coefficient of restitution is 0.820. (Figure 2) In the figure, 8-30.0" and =20.0 What is (VA)1. the velocity of tennis ball A, immediately before the collision? Express your answer numerically in meters per second to three significant figures. >View Available Hint(s) (VA)1-8.86 m/s Previous Answers ✓ Correct Part B Immediately after the collision, what are the x components of velocity for balls A and B (VA) and (vi). respectively, on the axis system shown? Express your answers numerically in meters per second to three significant figures separated by a comma. ▸ View Available Hint(s) 195.ΑΣΦ. 11 Ivec ? (VA). (V) 22.5,12.4 m/s